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. 2014 Mar 1;87(1036):20130677. doi: 10.1259/bjr.20130677

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© 2014 The Authors. Published by the British Institute of Radiology

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 Unported License http://creativecommons.org/licenses/by-nc/3.0/, which permits unrestricted non-commercial reuse, provided the original author and source are credited.

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Figure 4. — Hybrid positron emission tomography (PET)/MRI obtained 6 months after radiotherapy of laryngeal squamous cell carcinoma. Clinically, recurrence was suspected. (a) Axial fat-saturated T₂ shows diffuse oedema with posterior commissure involvement (arrow). No evidence of recurrence. (b) Fused T₂ and b 1000 illustrate absent restriction of diffusivity (arrow). Normal high signal of the spinal cord and nerve roots on b 1000. No major geometric distortion. (c) Fused PET and gadolinium-enhanced T₁ show increased 18-fludeoxyglucose uptake (mean standardized uptake value = 3.8; maximum standardized uptake value = 5.2) in the posterior commissure (arrow) suggesting recurrence. Surgical biopsy and follow-up revealed scar tissue.